Although the molting article says medium crabs can take 3-6 weeks, there really is no set timeline for molting. One of my crabs Buckbeak, built his cave right up next to the glass and he’s been there for 31 days and he has not shed his Exo yet. We’re on week 5. I have a couple of books covering the window for darkness to help trigger the molting hormone. I’m finding it’s more interesting to monitor the process than to dig and I don’t have to if I know exactly where the crab is.

Shipping would probably be expensive for shipping bags of playsand considering a bag weighs 50 lbs. The Hermit crab patch sells 25 lbs of pre mixes substrate for around $15 plus another $12 or so shipping. I'm sure shipping would be comparable $20+ for a $5-$6 bag.

I know most home improvement places, at least in my area, offer free delivery if you spend a certain amount. They would probably still deliver the sand to you for a delivery fee. It may be a lot more cost effective than paying shipping costs on several bags.

If you know someone with a truck, possibly a car too, maybe offer them some gas money to run you.

I may just wait until I can order a couple of bags of the Hermit Crab Patch’s pre-mixed sub or see if I can have play sand delivered but thank you for trying to help. I can’t ask anyone because the people where I live will think I’m crazy asking to take me to buy play sand for hermit crabs and will re direct me to a pet store to buy sand, which we all know is no no.